"不遗余力" literally means "not leaving any remaining strength," that is, exerting all one's effort without reservation. It originates from the Strategies of the Warring States, Zhao Strategies III, and originally referred to doing one's utmost in war, later generalized to describe doing things with all one's might and sparing no effort. This idiom emphasizes an attitude of unreserved commitment and is often used in a commendatory context to express extreme seriousness and dedication toward someone or something. In its deeper meaning, it embodies a sense of responsibility and a spirit of devotion, encouraging people not to be lazy or shrink back when facing important tasks or challenges, but to give their all. It is used in a wide range of scenarios, such as work, study, rescue operations, and public welfare. In terms of cultural background, it is in line with the value orientation in traditional Chinese culture of "serving with loyalty and utmost effort" and "working tirelessly until one's dying day." Its emotional tone is strong, carrying a sense of praise and encouragement.
📝 Example
1. In order to complete the project on time, he worked overtime for a whole week, sparing no effort to overcome the technical challenges. (Sparing no effort: using all one's energy, holding nothing back.)
2. The firefighters spared no effort in searching and rescuing the trapped people, refusing to give up even if there was only the slightest hope. (Sparing no effort: exerting all one's strength, going all out.)